CN117955509A - Radio frequency circuit, antenna device and electronic equipment - Google Patents

Abstract

The application relates to a radio frequency circuit, an antenna device and an electronic device, wherein the radio frequency circuit comprises: a radio frequency transceiver; a first communication path and a first antenna, the first communication path being connected to the radio frequency transceiver, the first antenna being connected to the first communication path and configured to transmit a first radio frequency signal output by the radio frequency transceiver via the first communication path; the second communication path, the path protection unit and the second antenna, the second communication path is connected with the radio frequency transceiver, the path protection unit is connected with the second communication path, the second antenna is connected with the path protection unit, and the path protection unit is configured to reduce the signal intensity of the first radio frequency signal transmitted to the second communication path, which is received by the second antenna, so that when multiple wireless communication systems in the radio frequency circuit work simultaneously, adverse effects of the wireless communication system (such as a satellite communication system) transmitting high-power signals on other wireless communication systems can be reduced, and good coexistence among the multiple wireless communication systems can be realized.

Description

Radio frequency circuit, antenna device and electronic equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a radio frequency circuit, an antenna apparatus, and an electronic device.

Background

Currently, with the continuous development of communication technology, wireless communication systems supported by mobile phones are increasing, such as cellular communication systems (e.g., 2G, 3G, 4G, 5G, etc.), short-range wireless communication systems (e.g., wiFi, bluetooth, etc.), global Positioning Systems (GPS), etc. When these wireless communication systems operate simultaneously, interaction is necessarily generated.

Therefore, it is important how to achieve good coexistence among various wireless communication systems in a mobile phone.

Disclosure of Invention

The embodiment of the application provides a radio frequency circuit, an antenna device and electronic equipment, which are used for realizing good coexistence among various wireless communication systems.

The embodiment of the application provides a radio frequency circuit, which comprises:

a radio frequency transceiver;

A first communication path and a first antenna, the first communication path being connected to the radio frequency transceiver, the first antenna being connected to the first communication path and configured to transmit a first radio frequency signal output by the radio frequency transceiver via the first communication path;

The antenna comprises a second communication path, a path protection unit and a second antenna, wherein the second communication path is connected with the radio frequency transceiver, the path protection unit is connected with the second communication path, the second antenna is connected with the path protection unit, and the path protection unit is configured to reduce the signal intensity of a first radio frequency signal transmitted to the second communication path and received by the second antenna.

The embodiment of the application also provides an antenna device, which comprises the radio frequency circuit of any one of the above.

The embodiment of the application also provides electronic equipment, which comprises a circuit board and a rear cover, wherein the circuit board is arranged in the rear cover, and a radio frequency circuit is arranged on the circuit board and is any one of the radio frequency circuits.

According to the radio frequency circuit, the antenna device and the electronic equipment provided by the application, the access protection unit is added in the radio frequency circuit, the second antenna is connected with the access protection unit, the access protection unit is connected with the second communication access, the second communication access is connected with the radio frequency transceiver, the first antenna is connected with the first communication access and is configured to transmit the first radio frequency signal output by the radio frequency transceiver through the first communication access, and the access protection unit is configured to reduce the signal intensity of the first radio frequency signal transmitted to the second communication access and received by the second antenna, so that when various wireless communication systems in the radio frequency circuit work simultaneously, the problem that the signal intensity (such as power) of the signal transmitted by the transmitting antenna is too high to cause the damage of the receiving access connected with the receiving antenna due to the too high received signal power can be avoided, and thus the adverse effect of a wireless communication system (such as a satellite communication system) transmitting high-power signals on other wireless communication systems (such as a satellite communication system) can be reduced, and good coexistence among various wireless communication systems can be realized.

Drawings

The technical solution and other advantageous effects of the present application will be made apparent by the following detailed description of the specific embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 2 is another schematic structural diagram of an electronic device according to an embodiment of the present application;

Fig. 3 is a schematic structural diagram of a radio frequency circuit according to an embodiment of the present application;

fig. 4 is a schematic diagram of a frequency response curve of a trap provided in an embodiment of the present application;

Fig. 5 is another schematic structural diagram of a radio frequency circuit according to an embodiment of the present application;

Fig. 6 is another schematic structural diagram of a radio frequency circuit according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of an antenna device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Satellite communication refers to communication implemented by a satellite as a base station or relay station.

Satellite communication is a communication technology which suddenly starts to be hot in recent years, and due to good coverage of the earth surface which is rarely reached by people such as non-land, remote mountain areas, polar regions and the like, the satellite communication will be called one of hot spot technologies of next generation mobile communication, and from the current development situation, more and more scientific enterprises are added into the industrial chain of satellite communication.

Currently, wireless communication systems supported by mobile phones are increasing, such as cellular communication systems (e.g., 2G, 3G, 4G, 5G, etc.), short-range wireless communication systems (e.g., wiFi, bluetooth, etc.), global Positioning Systems (GPS), etc. Because of the limitation of the antenna layout space on the mobile phone, the current design is generally performed by adopting a mode of sharing antennas by a plurality of systems/a plurality of frequency bands. More and more antennas are integrated on mobile phones, so that the space between the antennas is obviously reduced, and the obvious problem is that the isolation between the antennas is reduced. Meanwhile, since the two transceivers of the satellite communication system (especially, the high-orbit satellite) are far apart in distance (up to 36000 km), in order to achieve the same communication quality, the transceiver end needs to increase the signal strength of the transmitted signal so as to overcome the signal attenuation caused by the long distance.

However, when satellite communication (such as satellite call, satellite short message, etc.) is used as a functional option on the mobile phone, the transmitted signal of the satellite communication system (such as the space-borne satellite communication system) enters the receiving paths of other wireless communication systems on the mobile phone through the antennas of the other wireless communication systems on the mobile phone, and the power of the signal transmitted by the transmitter of the satellite communication system is very high, which causes damage to devices on the receiving paths of the other wireless communication systems on the mobile phone, and further causes abnormal operation of the other wireless communication systems on the mobile phone. Therefore, the coexistence of the satellite communication system with other wireless communication systems on the handset needs to be considered.

Based on the technical problems described above, the embodiments of the present application provide a radio frequency circuit, an antenna device, and an electronic apparatus, where by adding a path protection unit in the radio frequency circuit, the path protection unit can reduce damage to devices on receiving paths of other wireless communication systems after a high-power signal transmitted by a transmitter of a satellite communication system on a mobile phone enters a corresponding receiving path through an antenna of the other wireless communication systems on the mobile phone, so as to ensure that each wireless communication system on the mobile phone can work normally, thereby implementing functional coexistence of multiple wireless communication systems on the mobile phone.

The following detailed description is made in connection with specific embodiments, and it should be noted that the serial numbers of the following embodiments are not meant to limit the preferred order of the embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application, where the electronic device may be a smart phone, a tablet computer, or other devices. In some embodiments, as shown in fig. 1, an electronic device 100 may include a display screen 10, a center 20, a circuit board 30, a battery 40, and a rear cover 50.

Wherein the display screen 10 is mounted on the rear cover 50 to form a display surface of the electronic device 100. The display screen 10 is used as a front housing of the electronic device 100, and forms an accommodating space with the rear cover 50 for accommodating other electronic components or functional assemblies of the electronic device 100. Meanwhile, the display screen 10 forms a display surface of the electronic device 100 for displaying information such as images, text, and the like. The display screen 10 may be a Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) or an Organic Light-Emitting Diode (OLED) display.

In some embodiments, a glass cover plate may be provided on the display screen 10. The glass cover plate can cover the display screen 10 to protect the display screen 10 from being scratched or damaged by water.

In some embodiments, as shown in FIG. 1, display screen 10 may include a display area 11 and a non-display area 12. The display area 11 performs a display function of the display screen 10 for displaying information such as images and texts. The non-display area 12 does not display information. The non-display area 12 may be used to provide functional components such as cameras, headphones, display screen touch electrodes, and the like. In some embodiments, the non-display area 12 may include two areas located at upper and lower portions of the display area 11.

In some embodiments, as shown in FIG. 2, the display screen 10 may be a full screen. At this time, the display screen 10 may display information full-screen so that the electronic device 100 has a large screen duty ratio. The display screen 10 includes only the display area 11 and does not include the non-display area. At this time, functional components such as a camera and a proximity sensor in the electronic device 100 may be hidden under the display screen 10, and a fingerprint recognition module of the electronic device 100 may be disposed on the back of the electronic device 100.

The middle frame 20 may have a thin plate-like or sheet-like structure, or may have a hollow frame structure. The middle frame 20 may be accommodated in an accommodating space formed by the display screen 10 and the rear cover 50. The middle frame 20 is used to provide support for electronic components or functional assemblies in the electronic device 100 to mount the electronic components or functional assemblies together in the electronic device. For example, functional components such as a camera, a receiver, a circuit board, a battery, etc. in the electronic device may be mounted to the center 20 for fixing. In some embodiments, the material of the middle frame 20 may include metal or plastic.

The circuit board 30 is mounted in the housing space. For example, the circuit board 30 may be mounted inside the rear cover 50 and received in the receiving space. The circuit board 30 may be a motherboard of the electronic device 100. The circuit board 30 is provided with a grounding point to realize grounding of the circuit board 30. One, two or more of the functional components of a motor, microphone, speaker, receiver, headphone interface, universal serial bus interface (USB interface), camera, distance sensor, ambient light sensor, gyroscope, and processor may be integrated on the circuit board 30.

The battery 40 is mounted in the housing space. For example, the battery 40 may be mounted on the middle frame 20 and stored in the storage space together with the middle frame 20. A battery 40 may be coupled to the circuit board 30 to enable the battery 40 to power the electronic device 100. Wherein the circuit board 30 may be provided with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 40 to the various electronic components in the electronic device 100.

The rear cover 50 is used to form the outer contour of the electronic device 100. The rear cover 50 may be integrally formed. In the process of forming the rear cover 50, a rear camera hole, a fingerprint recognition module mounting hole and other structures can be formed on the rear cover 50.

In some embodiments, the rear cover 50 may be a metal rear cover, such as a metal of magnesium alloy, stainless steel, or the like. It should be noted that the material of the rear cover 50 in the embodiment of the application is not limited thereto, and other manners may be adopted, for example, the rear cover 50 may be a plastic rear cover, and for example, the rear cover 50 may be a ceramic rear cover. For another example, the rear cover 50 may include a plastic part and a metal part, and the rear cover 50 may be a rear cover structure in which metal and plastic are matched. Specifically, the metal portion may be formed first, for example, by injection molding to form a magnesium alloy substrate, and then injection molding plastic on the magnesium alloy substrate to form a plastic substrate, so as to form a complete rear cover structure.

In some embodiments, a Radio Frequency (RF) circuit is disposed on the circuit board 30, and the RF circuit may be any of the RF circuits provided in the embodiments of the present application. The radio frequency circuit may communicate with a network device (e.g., server, base station, etc.) or other electronic device (e.g., smart phone, etc.) over a wireless network to complete the transceiving of information with the network device or other electronic device.

In some embodiments, as shown in fig. 3, the radio frequency circuit 200 may include a radio frequency transceiver 201, a first communication path a, a first antenna 202, a second communication path B, a path protection unit 203, and a second antenna 204. Wherein the first communication path a is connected to the radio frequency transceiver 201, and the first antenna 202 is connected to the first communication path a and configured to transmit a first radio frequency signal output by the radio frequency transceiver 201 via the first communication path a. The second communication path B is connected to the radio frequency transceiver 201, the path protection unit 203 is connected to the second communication path B, the second antenna 204 is connected to the path protection unit 203, and the path protection unit 203 is configured to reduce the signal strength of the first radio frequency signal received by the second antenna 204 and transmitted to the second communication path B.

Specifically, the first communication path a may include a transmission path of a first wireless communication system, where the first wireless communication system may be a satellite communication system, for example, may be an heaven-through satellite communication system. The second communication path B may include a receiving circuit of a second wireless communication system, wherein the second wireless communication system may be a satellite positioning system, for example, GNSS (Global Navigation SATELLITE SYSTEM, global satellite positioning system).

Accordingly, the first radio frequency signal may include a satellite signal for satellite communication. The second communication path may be configured to transmit the second radio frequency signal received by the second antenna 204 to the radio frequency transceiver 201, and the second radio frequency signal may include satellite signals for positioning.

Wherein the frequency range of the first radio frequency signal is different from the frequency range of the second radio frequency signal. In some examples, the frequency of the first radio frequency signal may be between 1980MHz and 2010MHz, and the frequency of the second radio frequency signal may be around 1575 MHz.

In addition, it should be noted that, in this embodiment, by adding the path protection unit 203 to the radio frequency circuit 200, and the path protection unit 203 is configured to reduce the signal strength of the first radio frequency signal transmitted to the second communication path B received by the second antenna 204, when multiple wireless communication systems (such as a satellite communication system and a satellite positioning system) operate simultaneously in the radio frequency circuit 200, it is possible to avoid the adverse effect of the wireless communication system transmitting the high-power signal (such as a satellite positioning system) on other wireless communication systems (such as a satellite positioning system) caused by the excessive signal strength (such as power) of the signal transmitted by the transmitting antenna (i.e., the first antenna 202) of the satellite communication system, so that the good coexistence between multiple wireless communication systems is realized.

In some embodiments, as shown in fig. 3, the radio frequency transceiver 201 may have a transmit port TX and a receive port RX1/RX2. The transmitting port TX is used for transmitting radio frequency signals, and the receiving ports RX1/RX2 are used for receiving radio frequency signals. The number of the receiving ports RX1/RX2 may be plural, and the plurality of receiving ports RX1/RX2 may include a first receiving port RX1 and a second receiving port RX2.

Accordingly, the radio frequency transceiver 201 may further include a transmitter and a receiver, and each of the transmitting ports TX may correspond to and be connected with a corresponding transmitter, and each of the receiving ports RX1/RX2 may correspond to and be connected with a corresponding receiver.

In some embodiments, as shown in fig. 3, the first communication path a may be a transceiver path of the first wireless communication system, and may include a transmit path, a first receive path, and a transceiver switch 205, where the transmit path is connected to the transmit port TX, the first receive path is connected to the first receive port RX1, the transceiver switch 205 is connected to the transmit path and the first receive path, the first antenna 202 is connected to the transceiver switch 205, and the transceiver switch 205 has two conductive states.

Specifically, when the transmit-receive switch 205 is in the first conductive state, a connection is established between the transmit path and the first antenna 202 through the transmit-receive switch 205, and a connection is disconnected between the first receive path and the first antenna 202, so that the first antenna 202 can be used as a transmit antenna to transmit the first radio frequency signal output by the radio frequency transceiver 201 through the transmit path to the outside. When the transmit-receive switch 205 is in the second conductive state, the transmit path is disconnected from the first antenna 202, and the first receive path is connected to the first antenna 202 through the transmit-receive switch 205, so that the first antenna 202 can be used as a receive antenna to receive radio frequency signals from the outside, and the received radio frequency signals are sent to the radio frequency transceiver 201 through the first receive path.

In some examples, as shown in fig. 3, the transceiver switch 205 may be a single pole double throw switch, and includes a first end, a second end, and a third end, where the first end and the second end of the transceiver switch 205 are connected to a transmit path and a first receive path, respectively, and the first antenna 202 is connected to the third end of the transceiver switch 205. When the transmission/reception switch 205 is in the first conductive state, the first terminal and the third terminal of the transmission/reception switch 205 are conductive, and the second terminal and the third terminal of the transmission/reception switch 205 are disconnected. When the switch 205 is in the second conductive state, the first terminal and the third terminal of the switch 205 are disconnected, and the second terminal and the third terminal of the switch 205 are conductive.

In some specific examples, as shown in fig. 3, the first receiving path may include a first receiving amplifier 206, where an input terminal and an output terminal of the first receiving amplifier 206 are connected to a transceiver switch 205 (e.g., a second terminal of the transceiver switch 205) and a first receiving port RX1, respectively. The first receive amplifier 206 may be an LNA (Low Noise Amplifier, low noise power amplifier), among others.

In some specific examples, as shown in fig. 3, the radio frequency transceiver 201 may further have a feedback signal receiving port FBRX, and the transmit path may include a transmit amplifier 207, a feedback signal receiving amplifier 208, and a coupler 209, where an input end and an output end of the transmit amplifier 207 are connected to the transmit port TX and the coupler 209, respectively, an input end and an output end of the feedback signal receiving amplifier 208 are connected to the coupler 209 and the feedback signal receiving port FBRX, respectively, and the coupler 209 is connected to the transmit-receive switch 205 (e.g., a first end of the transmit-receive switch 205). Wherein the transmit amplifier 207 may be a Power Amplifier (PA), the feedback signal receive amplifier 208 may be an LNA (Low Noise Amplifier, low noise power amplifier), and the coupler 209 may be a directional coupler.

Specifically, during the process of the rf transceiver 201 transmitting the first rf signal through the transmission path, the coupler 209 may sample the first rf signal output by the rf transceiver 201 through the transmission port TX and amplified by the transmission amplifier 207 to obtain a feedback signal, and then the feedback signal may be amplified by the feedback signal receiving amplifier 208 and transmitted to the rf transceiver 201 through the feedback signal receiving port FBRX, so that the rf transceiver 201 controls parameters such as the power of the first rf signal transmitted by the rf transceiver according to the feedback signal.

In some embodiments, as shown in fig. 3, the second communication circuit B may be a transceiver path or a receiving path of the second wireless communication system, and may include a second receiving path (i.e., a receiving path of the second wireless communication system). The second receiving path may include a filter 210, where the filter 210 is configured to filter the radio frequency signal received by the second antenna 204 and transmitted to the second communication path B, and the signal strength of the first radio frequency signal after the signal strength is reduced by the path protection unit 203 is smaller than the maximum received signal strength allowed by the filter 210, so that the filter 210 in the second receiving path can be prevented from being burned due to the excessive signal strength of the received first radio frequency signal, so as to realize functional coexistence of the first wireless communication system and the second wireless communication system.

It should be noted that, the maximum received signal strength allowed by the filter 210 may refer to: the maximum sustainable signal strength (e.g., about 15dBm of power) of the filter 210 is exceeded, and the filter 210 will burn out, thereby causing the receiving path of the second wireless communication system to fail to operate properly.

In some examples, the first wireless communication system may be any wireless communication system (e.g., a satellite communication system, etc.) with a large signal strength (e.g., power) of a transmission signal, and the second wireless communication system may be any wireless communication system (e.g., a satellite positioning system, etc.) that has a signal receiving function and may operate simultaneously with the first wireless communication system.

Specifically, taking the example that the first wireless communication system and the second wireless communication system are respectively a satellite communication system and a satellite positioning system, the satellite communication system can be used only in a scene without a cellular network or a WiFi network, so that the satellite communication system has no coexistence problem with the cellular communication system and the WiFi communication system. However, if the user is in danger in a field scene, the user needs to share own position information to the rescue party so as to facilitate the opposite party to quickly locate the position of the help seeker. Thus, satellite communication systems need to coexist with satellite positioning systems such as GNSS (Global Navigation SATELLITE SYSTEM, global satellite positioning system).

The GNSS is a purely received system (i.e. only receiving positioning signals and not transmitting signals), and the transmitting signals of the satellite communication system enter the receiving path of the GNSS through the antenna of the GNSS, which may cause damage to devices (such as a filter) on the receiving path of the GNSS due to the high power of the transmitting signals of the satellite communication system, thereby causing abnormal operation of the GNSS.

Moreover, it can be understood that, in this embodiment, by adding the path protection unit 203 to the radio frequency circuit 200, and the path protection unit 203 is configured to reduce the signal strength of the first radio frequency signal transmitted to the second communication path B received by the second antenna 204, when the satellite communication system and the satellite positioning system operate simultaneously in the radio frequency circuit 200, the problem that the signal strength (such as power) of the signal (i.e., the first radio frequency signal) transmitted by the transmitting antenna (i.e., the first antenna 202) of the satellite communication system is too high, which results in that the receiving path (i.e., the second communication path B) of the satellite positioning system is damaged due to the too high power of the signal received by the receiving antenna (i.e., the second antenna 204) can be reduced, thereby reducing the adverse effect of the satellite communication system transmitting the high power signal on the satellite positioning system, and realizing functional coexistence of the satellite communication system and the satellite positioning system.

In some embodiments, as shown in fig. 3, the second receiving path may further include a second receiving amplifier 211, where an input end and an output end of the second receiving amplifier 211 are connected to an output end of the filter 210 and the second receiving port RX2, respectively, and an input end of the filter 210 is connected to the path protection unit 203.

Specifically, in the second receiving path, the filter 210 can filter the radio frequency signal received by the second antenna 204 to remove the interference signal, and send the filtered radio frequency signal to the second receiving amplifier 211, and the second receiving amplifier 211 can amplify the filtered radio frequency signal and send the amplified radio frequency signal to the radio frequency transceiver 201 through the second receiving port RX 2.

In some examples, the filter 210 may be a band-pass filter (band-PASS FILTER) that may only allow radio frequency signals within a receiving frequency band (i.e., a frequency range of a received signal) of the second wireless communication system to pass, while shielding radio frequency signals of other frequency bands. The second receiving amplifier 211 may be an LNA (Low Noise Amplifier, low noise power amplifier).

In some embodiments, as shown in fig. 3, the path protection unit 203 may have two states. Specifically, when the path protection unit 203 is in the first state, the path protection unit 203 can reduce the signal strength of the radio frequency signal having the frequency within the target frequency range, but not reduce the signal strength of the radio frequency signal having the frequency outside the target frequency range; when the path protection unit 203 is in the second state, the path protection unit 203 does not reduce the signal strength of the radio frequency signal having a frequency within the target frequency range, but also does not reduce the signal strength of the radio frequency signal having a frequency outside the target frequency range.

The frequency of the first radio frequency signal may be located only within the target frequency range, and the frequency of the second radio frequency signal may be located only outside the target frequency range. Specifically, the radio frequency circuit 200 may further include a control unit, and when the first antenna 202 transmits the first radio frequency signal, the control unit may control the path protection unit 203 to be in the first state, and when the first antenna 202 does not transmit the first radio frequency signal, the control unit may control the path protection unit 203 to be in the second state, so that when the first radio communication system and the second radio communication system operate simultaneously, the signal strength (such as power) of the signal transmitted by the transmitting antenna (i.e., the first antenna 202) of the first radio communication system is not too high, which results in the problem that the receiving path (i.e., the second receiving path) of the second radio communication system is damaged due to the too high power of the signal received by the receiving antenna (i.e., the second antenna 204), and meanwhile, the receiving frequency band of the second radio communication system is located within the passband of the wave trap 203A, and in the receiving frequency band of the second radio communication system, the signal attenuation introduced by the wave trap 203A is small, so that both the receiving antenna (i.e., the first antenna 202) of the second radio communication system and the second radio communication system need not be well-balanced, and the first radio communication system need not be well-balanced, and the coexisted.

In some examples, the path protection unit 203 reduces the signal strength of the first radio frequency signal received by the second antenna 204 and transmitted to the second communication path B, which may be referred to as: the attenuation coefficient is used to reduce the signal strength of the first radio frequency signal received by the second antenna 204 and transmitted to the second communication path B.

Accordingly, the signal strength of the first radio frequency signal after the signal strength is reduced may satisfy: r '=α×r, where R' is the signal strength of the first radio frequency signal after the signal strength is reduced, R is the signal strength of the first radio frequency signal before the signal strength is reduced, α is an attenuation coefficient, and α is greater than 0 and less than 1.

In other examples, the path protection unit 203 reduces the signal strength of the first radio frequency signal received by the second antenna 204 and transmitted to the second communication path B, which may be: the signal strength of the first radio frequency signal received by the second antenna 204 and transmitted to the second communication path B is reduced by the target strength value.

Accordingly, the signal strength of the first radio frequency signal after the signal strength is reduced may satisfy: r '=r- β, where R' is the signal strength of the first radio frequency signal after the signal strength is reduced, R is the signal strength of the first radio frequency signal before the signal strength is reduced, β is the target strength value, and β is greater than 0.

In other examples, the path protection unit 203 reduces the signal strength of the first radio frequency signal received by the second antenna 204 and transmitted to the second communication path B, which may be: the signal strength of the first radio frequency signal received by the second antenna 204 and transmitted to the second communication path B is reduced to zero or approximately zero.

In some embodiments, the path protection unit 203 may be specifically configured to reduce the signal strength of the first radio frequency signal received by the second antenna 204 to be less than the target strength threshold and then transmit the signal to the second communication path B. Wherein the target strength threshold may be less than or equal to a maximum received signal strength allowed by the second communication path B (e.g., the second receiving path).

Specifically, in the above embodiment in which the second communication path B includes the filter 210, the maximum received signal strength allowed by the second communication path B may specifically be the maximum received signal strength allowed by the filter 210 in the second communication path B.

In some embodiments, as shown in fig. 3, the path protection unit 203 may include at least one notch 203A, and the frequency of the first radio frequency signal is within a notch bandwidth of the notch 203A, so as to ensure that the notch 203A can reduce the signal strength of the first radio frequency signal.

In some examples, the frequency range of the first radio frequency signal may be between 1980MHz and 2010MHz, the frequency response curve Q of the trap may be as shown in fig. 4, and, as known from the frequency response curve Q, the trap bandwidth of the trap 203A may cover the frequency range of the first radio frequency signal (for example, between 1980MHz and 2010 MHz), so as to ensure that the trap 23A has a greater attenuation (for example, 15 dB) to the radio frequency signal in the frequency range of the first radio frequency signal, and a smaller attenuation (for example, 0.1 dB) to the radio frequency signal outside the trap bandwidth.

Specifically, in the above embodiment in which the path protection unit 203 includes the wave traps 203A, the number of the wave traps 203A included in the path protection unit 203 may be one or more.

In some examples, the number of the traps 203A included in the path protecting unit 203 may be one, and the trap 203A can reduce the signal strength of the first radio frequency signal received by the second antenna 204 to be less than the target strength threshold.

In other examples, the number of the traps 203A included in the path protecting unit 203 may be plural, and the plural traps 203A may be connected in series, and may sequentially reduce the signal strength of the first radio frequency signal received by the second antenna 204 until the signal strength is less than the target strength threshold.

In some embodiments, as shown in fig. 5, the path protection unit 203 may be specifically configured to prevent the first radio frequency signal received by the second antenna 204 from being transmitted to the second communication path B. That is, the path protection unit 203 can prevent the first rf signal received by the second antenna 204 from being transmitted to the second communication path B, so that the influence of the first rf signal transmitted by the first antenna 202 on the second communication path B can be completely avoided, so as to ensure the function of the second communication path B.

In some embodiments, as shown in fig. 5, the path protection unit 203 may include a first switch 203B, where the first switch 203B may be configured to be turned on or off to establish or disconnect the connection between the second antenna 204 and the second communication path B. Specifically, when the first switch 203B is turned on, a connection can be established between the second antenna 204 and the second communication path B through the first switch 203B, so that the radio frequency signal received by the second antenna 204 can be transmitted to the second communication path B, thereby implementing the function of the second communication path B, so as to ensure that the second communication path B can work normally. When the first switch 203B is turned off, the second antenna 204 is turned off from the second communication path B, so that the radio frequency signal received by the second antenna 204 cannot be transmitted to the second communication path B, thereby avoiding the performance of the second communication path B from being affected by the first radio frequency signal transmitted by the first antenna 202 being transmitted to the second communication path B after being received by the second antenna 204.

Specifically, the radio frequency circuit 200 may further include a control unit, where the control unit may be configured to output a control first electrical signal (e.g., a high level) to the first communication circuit a and the first switch 203B, so that the first communication circuit a sends the first radio frequency signal output by the radio frequency transceiver 201 to the first antenna 202, and turns off the first switch 203B, and may be configured to output a control second electrical signal (e.g., a low level) to the first communication circuit a and the first switch 203B, so that the radio frequency transceiver 201 stops transmitting the first radio frequency signal through the first antenna 202, and turns on the first switch 203B, thereby implementing that the first switch 203B is turned off when the first antenna 202 transmits the first radio frequency signal, and implementing that the first switch 203B is turned on when the first antenna 202 does not transmit the first radio frequency signal, so that not only can the influence of the first radio frequency signal transmitted by the first antenna 202 on the second communication path B be avoided, but also normal operation of the second communication path B can be ensured.

Also, it will be appreciated that during the time when the rf transceiver 201 transmits the first rf signal via the first antenna 202 and the first switch 203B is turned off, the function of the second wireless communication system may be affected to some extent by the communication path of the second wireless communication system (i.e., the second communication path B) failing to normally receive the signal during this time, but the second wireless communication system may still be kept operating normally. Taking the second wireless communication system as an example of the satellite positioning system, the satellite positioning system can still perform positioning, but the positioning accuracy is slightly reduced.

In some examples, as shown in fig. 5, the first switch 203B may be a single pole double throw switch, and includes a first end, a second end, and a third end, where the first end of the first switch 203B may be connected to the second communication path B, the second end of the first switch 203B may be grounded, and the third end of the first switch 203B may be connected to the second antenna 204. The first switch 203B may be turned on as follows: the first end of the first switch 203B is connected to the third end, and the second end of the first switch 203B is disconnected from the third end. The first switch 203B being turned off may be: the first terminal of the first switch 203B is disconnected from the third terminal, and the second terminal of the first switch 203B is connected to the third terminal.

In this embodiment, the degree of reduction of the signal strength of the first radio frequency signal received by the second antenna 204 and transmitted to the second communication path B by the path protection unit 203 may be determined by the maximum received signal strength allowed by the second communication path B and the isolation between the first antenna 202 and the second antenna 204. Also, since the maximum received signal strength allowed by the second communication path B may be a fixed value, the path protecting unit 203 may decrease the signal strength of the first radio frequency signal transmitted to the second communication path B, which is received by the second antenna 204, more than the isolation between the first antenna 202 and the second antenna 204 is small, so as to ensure that the signal strength of the first radio frequency signal, which is decreased in signal strength, may be greater than the maximum received signal strength allowed by the second communication path B.

In some examples, the degree of reduction of the signal strength of the first radio frequency signal received by the second antenna 204 and transmitted to the second communication path B by the path protection unit 203 may be as follows: r '=r-d 1-d2 < d3, where R' is the signal strength of the first radio frequency signal after the signal strength is reduced, R is the signal strength of the first radio frequency signal, d1 is the isolation between the first antenna 202 and the second antenna 204, d2 is the reduction degree of the signal strength of the first radio frequency signal received by the path protection unit 203 by the second antenna 204 and transmitted to the second communication path B, and d3 is the maximum received signal strength allowed by the second communication path B. In some specific examples, R, d, d2, and d3 may be 36dB, 15dB, and 15dB, respectively, and R' =36 dB-15 db=6 dB < d3=15 dB, that is, the signal strength of the first radio frequency signal after the signal strength is reduced is less than the maximum received signal strength allowed by the second communication path B, so that the devices in the second communication path B can be prevented from being damaged.

In some embodiments, as shown in fig. 6, the radio frequency circuit 200 described above may also include a processor 212 and a sensor module 213. Wherein the processor 212 may be connected to the radio frequency transceiver 201, and the sensor module 213 may be connected to the processor 212.

In particular, the sensor module 213 may detect an operation state of the radio frequency circuit 200 or an environmental state (e.g., a state of a user) external to the radio frequency circuit 200, and then generate an electrical signal or data value corresponding to the detected state and transmit the electrical signal or data value to the processor 212. In some examples, the sensor module 213 may include a gesture sensor, a gyroscope sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an Infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

As can be seen from the foregoing, in the radio frequency circuit provided in this embodiment, by adding the path protection unit to the radio frequency circuit, and connecting the second antenna with the path protection unit, the path protection unit is connected with the second communication path, the second communication path is connected with the radio frequency transceiver, the first antenna is connected with the first communication path and is configured to transmit the first radio frequency signal output by the radio frequency transceiver via the first communication path, and the path protection unit is configured to reduce the signal strength of the first radio frequency signal transmitted to the second communication path and received by the second antenna, so that when the radio frequency circuit transmits and receives signals, the problem that the signal strength (for example, power) of the signal transmitted by the transmitting antenna is too high, so that the receiving path connected with the receiving antenna is damaged can be avoided.

Moreover, it should be noted that, since the radio frequency circuit provided by the embodiment of the present application is provided in the electronic device provided by the embodiment of the present application, the beneficial effects that any radio frequency circuit provided by the embodiment of the present application can achieve can be achieved, and detailed descriptions of the foregoing embodiments are omitted herein.

Referring to fig. 7, fig. 7 is a schematic structural diagram of an antenna device according to an embodiment of the application. As shown in fig. 7, the antenna device 300 may include the radio frequency circuit 301 of any of the embodiments described above.

The radio frequency circuit 301 may include a radio frequency transceiver, a first communication path, a first antenna, a second communication path, a path protection unit, and a second antenna, where the first communication path is connected to the radio frequency transceiver, the first antenna is connected to the first communication path and configured to transmit a first radio frequency signal output by the radio frequency transceiver via the first communication path, the second communication path is connected to the radio frequency transceiver, the path protection unit is connected to the second communication path, the second antenna is connected to the path protection unit, and the path protection unit is configured to reduce a signal strength of the first radio frequency signal received by the second antenna and transmitted to the second communication path.

In some examples, the antenna apparatus 300 may communicate with a network device (e.g., a server) or other electronic device (e.g., a smart phone) through a wireless network to enable information transceiving with the network device or other electronic device.

It should be noted that, since the antenna device provided by the embodiment of the present application is provided with the radio frequency circuit, the beneficial effects that any radio frequency circuit provided by the embodiment of the present application can achieve can be achieved, and detailed descriptions of the foregoing embodiments are omitted herein.

The above describes in detail a radio frequency circuit, an antenna device and an electronic device provided by the embodiments of the present application, and specific examples are applied herein to illustrate the principles and embodiments of the present application, where the above description of the embodiments is only for helping to understand the method and core ideas of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.

Claims (11)

1.A radio frequency circuit, comprising:

a radio frequency transceiver;

A first communication path and a first antenna, the first communication path being connected to the radio frequency transceiver, the first antenna being connected to the first communication path and configured to transmit a first radio frequency signal output by the radio frequency transceiver via the first communication path;

The radio frequency transceiver comprises a second communication channel, a channel protection unit and a second antenna, wherein the second communication channel is connected with the radio frequency transceiver, the channel protection unit is connected with the second communication channel, the second antenna is connected with the channel protection unit, and the channel protection unit is configured to reduce the signal intensity of the first radio frequency signal which is received by the second antenna and transmitted to the second communication channel.

2. The radio frequency circuit of claim 1, wherein the path protection unit is specifically configured to reduce the signal strength of the first radio frequency signal received by the second antenna to be less than a target strength threshold and then transmit the signal strength to the second communication path.

3. The radio frequency circuit according to claim 2, wherein the path protection unit comprises at least one trap, the frequency of the first radio frequency signal being within a trap bandwidth of the trap.

4. The radio frequency circuit according to claim 1, wherein the path protection unit is specifically configured to prevent the first radio frequency signal received by the second antenna from being transmitted to the second communication path.

5. The radio frequency circuit of claim 4, wherein the path protection unit comprises a first switch configured to be turned on or off to establish or break a connection between the second antenna and the second communication path.

6. The radio frequency circuit of claim 5, further comprising a control unit configured to output a control electrical signal to the first communication path and the first switch to cause the first communication path to transmit the first radio frequency signal output by the radio frequency transceiver to the first antenna and to cause the first switch to open.

7. The radio frequency circuit according to claim 1, wherein the second communication path includes a filter configured to filter the radio frequency signal received by the second antenna and transmitted to the second communication path to the radio frequency receiver, and the signal strength of the first radio frequency signal reduced by the path protection unit is smaller than a maximum received signal strength allowed by the filter.

8. The radio frequency circuit of claim 1, wherein the path protection unit reduces the signal strength of the first radio frequency signal received by the second antenna and transmitted to the second communication path to a greater extent as the isolation between the first antenna and the second antenna is smaller.

9. The radio frequency circuit of claim 1, wherein the first radio frequency signal comprises a satellite signal for satellite communication, and the second communication path is configured to transmit a second radio frequency signal received by the second antenna to the radio frequency transceiver, the second radio frequency signal comprising a satellite signal for positioning.

10. An antenna device comprising a radio frequency circuit as claimed in any one of claims 1 to 9.

11. An electronic device, characterized in that the electronic device comprises a circuit board and a rear cover, the circuit board is arranged inside the rear cover, a radio frequency circuit is arranged on the circuit board, and the radio frequency circuit is the radio frequency circuit of any one of claims 1 to 9.